DTUS1110

DENTAL TRIBUNE | April 2010 Clinical 11A AD Fig. 4: Prep with liner. Fig. 5: Identic hydrocolloid impression. floor, creating an even floor and filling in undercuts that were originally prepared for car- ies removal and amalgam retention (Fig. 4). After the tooth was insulated, the prep was refined with a flat-end cylinder, fine-grit, short shank diamond. Two Identic hydrocolloid impressions (Dux Dental) were taken to make the onlay in the lab (Fig. 5). Lab work After disinfecting the impressions, the assis- tant immediately poured them with MACH-SLO (Parkell) and based them with a rigid, fast- setting bite registration material such as Blu- Mousse (Parkell) (Fig. 6). Within two minutes, we had a silicone work- ing model on which to build the onlay (Fig. 7). The undercuts were then blocked out with a waxer, paying special attention to avoid the margins (Fig. 8). Starting with the Premise Indirect (Kerr Dental) dentinal shades and ending with incisal shades, the onlay was incrementally fabricated Fig. 3: Caries detector. g DT page 13A